21202022012002 has 16 divisors (see below), whose sum is σ = 35175080179512. Its totient is φ = 9521074333440.

The previous prime is 21202022011997. The next prime is 21202022012029. The reversal of 21202022012002 is 20021022020212.

It can be written as a sum of positive squares in 4 ways, for example, as 21108796213761 + 93225798241 = 4594431^2 + 305329^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11019760999 + ... + 11019762922.

Almost surely, 2^{21202022012002} is an apocalyptic number.

21202022012002 is a deficient number, since it is larger than the sum of its proper divisors (13973058167510).

21202022012002 is a wasteful number, since it uses less digits than its factorization.

21202022012002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22039523973.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21202022012002 its reverse (20021022020212), we get a palindrome (41223044032214).

The spelling of 21202022012002 in words is "twenty-one trillion, two hundred two billion, twenty-two million, twelve thousand, two".